Cap for a drinking container



FIG. 1 is a perspective view of a cap for a drinking container of our new design.

FIG. 2 is a right side elevation thereof.

FIG. 3 is a left side elevation thereof.

FIG. 4 is a front elevation thereof.

FIG. 5 is a back elevation thereof.

FIG. 6 is a top plan thereof; and,

FIG. 7 is a bottom plan thereof.

The broken lines and the areas within them depict portions of the cap for a drinking container that form no part of the claimed design. 

CLAIM I claim the ornamental design for a cap for a drinking container, as shown and described. 